Lu Wuxie, the last Celestial Master, ventures into a deadly tomb deep in the Greater Khingan Range in search of his missing master—only to uncover a shocking conspiracy behind the evil cult known as the "Longevity Society." From the eerie villages of Xiangxi to the Dragon Palace beneath the Yellow River, from the illusionary Peach Blossom Spring to the desperate cliffs of Changbai, he fights a bloody path alongside his junior sister, Lin Yue. Yet step by step, they fall into a death trap laid out by a thousand-year-old corpse demon. As his dearest family and beloved fall one after another, the white-haired Thunder God awakens in utter despair—calling the dragon with his blood, and sealing the demon with his life. On the day light returns to heaven and earth, he carries his frozen lover toward Kunlun, spending the rest of his days to fulfill an unfinished vow.